Earthquakes

Category: Geography

Title: Earth movements

Sudden disturbance below earth surface which spread, may produce shakings in crust. When rocks break the particle next to it are set to motion. It is the movement of rock mass against another. That causes vibrations reach surface and are known as earthquake waves. If rock breaks deep inside earth surface tremors too weak to reach the surface

 

‘Focus’ is the point where earthquake originates inside earth.the point just above focus is called ‘epicentre’.  The shock waves travel in all directions from the focus point. On surface shaking strongest near the ‘epicentre’.

 

The study of earthquakes is known as Seismology. About 68 percent of all earthquakes observed in the vast regions of the pacific ocean as a ‘ring of fire’ and is closely linked with crustal dislocation and volcanic phenomenon

 

Question

Consider the following statements.

  1. Seismology is the study of Earthquakes
  2. ‘Focus’ is the point where earthquake originates

Which of the above statements is/are correct?

A) 1 only
B) 2 only
C) Both
D) None

Answer: C